| Antagonism: Press publishing works in the struggle against capitalist and the state and for a world human community. Includes a list of books available for order and several online texts. |
| Break Their Haughty Power: Loren Goldner's leftist essays and interventions over the years, and notices from Queequeg Press. |
| Global Communist Group: Dedicated to the clarification and development of communist theory and practice. Rejects Trotskyism, Stalinism and Leninism. Site includes access to the Communist List email group and archives and to the Commuist Think Tank. |
| International Bureau for the Revolutionary Party: Founded by the Communist Workers Organisation (Britain) and the Partito Comunista Internazionalista, the IBRP promotes the left communist ideas of Amadeo Bordiga and publishes the journal International Communist. |
| International Communist Current: The origins of the ICC lie in the left communists expelled from the 3rd International as it degenerated - the Italian, German, and Dutch lefts. These groups defended proletarian internationalism against participation on either side in World War II, just as the internationalists (Bolsheviks, Spartakus, Tribune Group) had done during World War I. |
| International Communist Party: Left communist formation in Italy that originated from the left of the Italian Socialist Party, and its paper during the First World War called il soviet. |
| Intervention of OCI: Internationalist Communist organization (Organizzazione comunista internazionalista OCI) is a Marxist revolutionary tendency of working class that publishes the magazine che fare. |
| Love and Treason: A collection of documents of revolutionary extremist agitation and propaganda produced between 1982 and 2001. Influenced by the Conspiracy of Equals, Marx, left communism, the Situationist International and class struggle anarchism. |
| n + 1: Historical archives of the "Italian" Communist Left who founded the Party in Italy and opposed the degeneration of Third Communist International. |
| sinistra.net: Archives of the communist left. |